Question # 1

7²ⁿ+ 3^n-1. 2^3n-3is divisible by

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24

25

9

13

6! = ______

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360

720

6.5.4

None of these

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c/a

-c/a

b/a

-b/a

Domain of sin x is ______

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The sum of the odd coefficients in the expansion of (a + x)⁴is

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14

12

8

4

The number of permutation that can be formed from the letters of the word OBJECT is

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700

600

720

620

The first three terms in the expansion of (1 - x)^-2are

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1 - 2x + 3x²

1 - 2x - 3x²

1 + 2x + 3x²

-2 - 2x +3x²

If the domain of the function f: x⟶ 2x³+ 1 is {-1,2,3}, the range of the function is

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{3,2,5}

{1,3,9}

{-1,-2,-3}

{3,9,19}

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28 / 81

28 / 243

81 / 28

243 / 82

if A = (x/x€ Q˄ 0 < x < 1}, the A is

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Infinite set

Finite set

Set of rational numbers

Set of real numbers

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A matrix in which the number of rows is equal to the number of columns is called a

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Diagonal matrix

Rectangular matrix

Square matrix

Scalar matrix

The set {0,-1} hold closure property under

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Addition

Both a & c

Multiplication

None of these

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Multiplicative inverse of "1" is

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0

-1

1

{0, 1}

If a,b c are sides of a triangle taken in order then a x b =

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b x c

b x a

cxa

Both a & b

The principal value of sin-1√(3/2) is

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-π/3

π/3

2π/3

π/2

If for the matrix A, A⁵= I, then A^-1=

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A²

A³

A

None of above

If #n = (n-5)2 + 5, then find #3 x #4.

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54

12

4

9

The graph of a quadratic function is

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Circle

Straight line

Parabola

Triangle

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5x^{4 + c}

1/6 x⁶+ c

5x²+ c

1/5 x⁶+ c

In set builder notation the set {0,1,2,........100} can be written as

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{x / xε B ∧ x ≤ 100}

{x / x ∈ W ∧ x < 101}

{x / x ∈ Z ∧ x < 101}

The set of first 100 whole numbers

The number of terms in the expansion of (a + x)¹²is

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13

12

11

10

The area of circle of unit radius =

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0

1

4

π

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0

1

8

∞

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none of these

A point (x,y) which satisfy a linear inequality in two variables form its

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Solution

Domain

Range

None

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In(x²- x + 1)⁴+ c

If a₁, r are first term and the common ratio respectively then the sum of an infinite geometric series is

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A∪(A∪B)= --------------------

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B

A

A∪B

None of these

The order of the matrix A is 3 x 2 and that of B is 2 x 3. The order of the matrix BA is

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3 x 3

3 x 2

2 x 5

5 x 2

s > t then

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(s - t)²> (t - s)²

(s - t)²< (t - s)²

(s - t)²= (t - s)²

None

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If one root of the equation ix²- 2(i + 1) x +(2 - i) = 0 is 2 - i, then the other root is

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-i

2 + i

i

2 - i

The vertex of the graph of the quadratic function f(x) = x2 -10, is

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(0 , -10)

(-10,0)

(10,0)

(0,10)

If (0, 0) and (0, -1) are end points of a diameter, then the equation of the circle is

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The transport of a square matrix is a

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Row matrix

Column matrix

Square matrix

Null matrix

For any set B,B∪B' is

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Is set B

Set B'

Universal set

Point (2,0) lies on trigonometric function f(x)=______;

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sinx

cosx

tanx

secx

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none of these

A rectangular hyperbola whose centre is C is cut by any circle of radius r in four points P, Q, R and S. Then CP²+ CQ²+ CR²+ CS²=

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r²

2 r²

3 r²

4 r²

The multiplicative inverse of 1 - 2i is

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G = {e, a, b, c} is an Abelian group with e as identity element The order of the other elements are

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2,2,2

3,3,3

2,2,4

2,3,4

For all points (x,y) on x-axis

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x is positive

x is negative

y = 0

y is negative

The line through the centre and perpendicular to the transverse axis is called the

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Major axis

Minor axis

Focal axis

Conjugate axis

If a, b, c are the measures of the sides of a triangle then

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The equations of the line thro' the point (2, 3, -5) and equally inclined to the axis are

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Two sets A and B are said to be disjoint if

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1

-1

5

2

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The equation of the plane which bisects the line joining (2, 3, 4) and (6, 7, 8) is

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x + y + z - 15 = 0

x - y + z - 15 = 0

x - y - z - 15 = 0

x + y + z + 15 = 0

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If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

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36 + (-32)i

-36 + 32i

6 + (-11)1

0, +(-12)i

The sum of the coefficient in the expansion of (a + x)⁵is

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32

16

8

5

If f(x) = tan x then f(0) is

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0

1

1/2

What is the number of elements of the power set of { }

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0

1

2

3

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(-1, 2)

(-1, 1)

(1, 2)

{-1}

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none of these

The null vector is regarded to be perpendicular to

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Every vector

In some cases

Both a b

None

If a > b or a < b than a = b is a

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Additive property

Transitive property

Trichotomy property of inequality

Each point of the feasible region is called

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Solution

feasible solution

Both a & b

None

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I quadrant

II quadrant

III quadrant

IV quadrant

45° = ______

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The span of a standard parabola depends upon

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x

a

y

y2

The harmonic mean between a and b is

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The law of sines can be used to solve

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Right angle triangle

Isosceles triangle

oblique triangle

haxagon

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G = {e, a, b, c} is an Abelian group with e as identity element. The order of the other elements are

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2, 2, 2

3, 3, 3

2, 2, 4

2, 3, 4

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sin 2 α=

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An unbiased die is thrown. Then the probability of getting a prime is

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1/2

2/3

3/4

None of these

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The set {1, -1, 1, -1}, form a group under

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Addition

Multiplication

Subtraction

None

Range of secθis

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Z - {x | -1 < x < 1}

W - {x | -1 < x < 1}

R - {x | -1 < x < 1}

R

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cot x + c

tan x + c

-cot x + c

-tan x + c

The value of x, and y, when (x + iy)²= 5 + 4i

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X = 2, y = -1

X = -2, y=1

X = 2, y = -1

X = 2, y = 2

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[0,1[

[0, 1]

]0, 1[

None of these

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a constant function

linear function

quadratic funtion

none of these

The equation of motion of a stone thrown vertically up wards is s = ut - 4.9t²the maximum height attained by it =

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A positive integer

A negative integer

A natural number

An irrational number

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

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(ac,bd)

(ac+bd, ad-bc)

(ac-bd , ad+bc)

(ac-bd , ad-bc)

How many necklaces can be made from 6 beads of different colours?

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120

60

24

15

∀a,b ε R, ab = be is a

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Commutative law of multiplication

Closure law of multiplication

Associative law of multiplication

Multiplicative identity

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A

B

U

None of these

The point of concurrency of the angle bisectors of a triangle is called

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incentre

circumcentre

e-centre

centroid

The number of proper subset of A ={a.b.c.d} is

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3

6

8

15

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0

1

2

none of these

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6x + 2 + c

6x + x²+ c

6x³+ x²+ x

Choose an answer

I

|A|

|A| I

None of these

The set of months in a year beginning with S.

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{September, October, November}

Singleton set

Null set

Empty set

What is the axis of the parabola y²= 4ax?

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x = 0

y = 0

x = a

y = 0

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The set of complex numbers forms

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Commutative group w.r.t addition

Commutative group w.r.t multiplication

Commutative group w.r.t division

Non commutative group w.r.t addition

There are ______ basic techniques for solving a quadratic equation

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Two

Three

Four

None of these

The function whose range consists of just one element is called

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One-One Function

Identity Function

Onto Function

Constant Function

If all members of a sequence are real numbers then it is called

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A.P

Real Sequence

G.P

None of these

If cosα= 4/5, then cosα/2

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(a - c)²= b²- c²

(a - c)²= b²+ c²

(a + c)²= b²- c²

(a + c)²= b²+ c²

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2x + 3

x²+ 3 + c

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0

20

90

80

In a group the atomic size increase downward due to

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Addition of electronic shells

Increase in the proton number

Repulsion of electrons

All of the above

The unit of rate constant k is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Third order reaction

Zero order reaction

Which are used as essences (flowers)?

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Aldehydes

Ketones

Alcohols

Esters

Which one of the following reaction rate is effected by the light

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Solutions containing relatively lower concentrations of solute are called :

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Concentrated solutions.

Lighter solutions.

Dilute solutions.

None of above.

Which one of the following statements of glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

Sodium can be obtained by :

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Electrolysis of acidified water.

By heating NaCl and water at 100°

Electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride.

I-Phenylethanol can be prepared by reaction of benzaldehyde with

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Methyl iodide an Magnesium

Methyl bromide

Methyl bromide and AIBr₃

C₂H₅l and Mg

(CH₂O)_nis general formula for

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Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

Cuprous ore among the following is

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Chalcopyites

Azurite

Cuprite

Malachitre

Molarity of pure water is :

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33.3

55.5

44.4

66.6

Which shows maximum catenation property?

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S

Se

Te

O

When a carboxylic acid reacts with a metal ______ gas is evolved

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H₂

CO₂

CI₂

None of these

Drained sewage has B.O.D

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More than that of water

Less than that of water

Equal to that of water

None of the above

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

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Favour the formation of N₂O₄

Favour the decomposition of N₂O₄

Not alter the equilibrium

Stop the reaction

Polymerization of ethane take place at pressure of 100 atm and a temperature of

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200°C

400°C

600°C

800°C

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8 g

16 g

32 g

24 g

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

The oxidation number of chromium in K₂Cr₂O₇is

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14

12

6

None of these

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

Which is not a component of environment

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Biosphere

Lithospahre

Hydrosphere

None of these

Which is a mixture of low boiling hydrocarbon

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Natural gas

Petroleum

Wood

Graphite

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

Choose an answer

Plank's equations

de Broglie's equations

Heisenburg's equation

None

The unit of rate constant is the same as that of the rate of reaction in :

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First order reaction.

Second order reaction.

Zero order reaction.

Third order reaction.

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

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0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

Chlorobenzene on heating with aqueous NH₃under pressure in the presence of cuprous chloride gives

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Benzamide

Nitrobenzene

Aniline

Chloroaminobenzene

Water shows maximum density at

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4°C

0°C

100°C

-4°C

Terylen fibre is made by reaction of terephthalic acid with

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Ethylene

Ethylene glycol

Glycol

Terylene

Which behaves as insulator for animals body?

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Carbohydrates

Proteins

Fats

Skin

Le-chatlier's principle is applied on the reversible reaction in order to

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Determine the rate of reaction

Predict the direction of reaction

Determine the extent of reaction

Find best conditions for favorable shifting the position of equilibrium

3 moles of ethanol react with one mole of phosphorus tribromide to from 3 moles of bromoethane and on mole of X. Which of the following is X?

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H₃PO₄

H₃PO₂

HPO₃

H₃PO₃

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

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Esters

Alcohols

Alkanes

Aldehydes

The maximum number of electrons in the outermost shall of s-black elements is

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One

Two

Three

Four

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

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They have an electrophilic carbon

They have an electrophilic carbon and good living gorup

They have an electrophilic carbon and bad living group

They have an nucleophilic carbon and good living gorup

In an electrolytic cell, the electrons flow from :

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Cathode to anode or opposite

Cathode to anode

Anode to cathode

Random flow

Which of the following elements should be the least metallic in character

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Rb

ln

Te

l

In physical and chemical properties, transition elements show

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Similarities

Dissimilarities

Both of these

Somestimes similarities, sometimes dissimilarities

Primary alcohols and aldehydes are oxidized to corresponding:

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alkanes

alkenes

Alkynes

Carboxylic Acid

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic acid

It is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

Which is independent of temperature

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Molarity

Molality

Normality

Mole fraction

Molar mass of high molecular w.f. polymers ranges form:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000000 to 10000000

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grmas of fat, this is called

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Oil number

Saturation number

Iodine number

Un saturation number

The development of disagreeable odur in fats or oil is called

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Fragrance

Perfume

Rancidity

Smell

The solid remained on filter paper during the filtration is called the :

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Substance.

Residue.

Undue.

Filtrate.

Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent

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Butan-1-ol

Butan-2-ol

2-methylpropan-1-ol

2-methylpropan-2-ol

Choose an answer

Zero

1

2

1.5

Which of the following decolorized Br₂-water

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Methane

Ethane

Ethene

Propane

Hydrolysis of an ester gives a carboxylic acid which on Kolbe's electrolysis yields ethane. the easter is

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Ethyl methonoate

Methyl ethanoate

Propylamine

Ethylamine

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃- O - CH₃

C₂H₅OH

Choose an answer

0

1

2

3

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

Choose an answer

+712 KJ mol^-1

+492 KJ mol^-1

-932 KJ mol^-1

-960 KJ mol^-1

The fibre which is made from acrylonitrile as monomer:

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

The chemist who synthesized urea form ammonia cyanate was:

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Berzelius

Kolbe

Wohler

Lavoiser

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

Replacement of hydrogen atom by - SO₃H group in benzene is called

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Nitration

Alkylation

Sulphonation

Acylation

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

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White

Red

Yellow

None of these

Given date

(i) heat of neutralization of HCl and NaOH is -57.3 KJ mole^-1

(ii) heat of neutralization of CH₃COOH with NaOH is 55.2 KJ mole^-1

The enthalpy of ionization of CH₃COOH is a determined according to Hess's law by

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Adding i and ii

Dividing i by ii

Subtracting i from ii

Subtracting ii from i

An electron with n = 3 , l = 2 will be in the sub-shell

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3p

3d

3f

3s

According to the periodic law, the chemical properties of the elements are periodic functions of their

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Density

Atomic number

Atomic mass

Mass number

Compounds having the same molecular formula, but different functional groups show

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Metamerism

Position isomerism

Chain isomerism

Functional group isomerism

What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al₂O₃?

Choose an answer

26 g

127 g

51 g

108 g

Which is the used as test for the presence of alkenes

Choose an answer

Reaction of cold dilute alkaline KMnO₄

Combustion

Polymerization

Catalytic hydrogenation

The amount of heat evolved or absorbed in a process in the same whether the process takes place in one or several steps is the statement of

Choose an answer

First law of thermodynamics

Hess's law

Coulomb's law

Phase law

How much pesticides have been synthesized at present?

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Four thousands

Six thousands

Eight Thousands

Ten thousands

Glyptal polymer is obtained from glycerol on reacting with

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Malonic acid

Phthalic acid

Maleic acid

Acetic acid

Ethyl alcohol gives ethyl chloride with the help of

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SOCl₂

NaCl

Cl₂

KCl

The reaction rate is expressed in the units of

Choose an answer

mol dm^-3S^-

mol dm^-3

mol dm^-3N^-

dm^-3S^-

The most acidic of the following compounds is

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P₂O₃

Sb₂O₃

B₂O₃

As₂O₃

Which of the following alkyl halides is used as a mathylating agent

Choose an answer

CH₂H₅l

CH₃l

C₂H₅Pr

C₂H₅Cl

Which of these polymers is an addition polymer?

Choose an answer

Nylon-6,6

Polystrene

Terylene

Epoxy resin

Which of the following is obtained by condensation polymerization?

Choose an answer

Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

Which salt is used for preserving food

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CaCl₂

NaCl

Na₂SO₄

BaCl₂

The organic compounds which are derivative of hydrocarbons of oxygen are:

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Carbohydrates

Phenols

Alcohals

All of these

Chloroform is carcinogenic:

Choose an answer

Heart

Lungs

Liver

Kidney

Lead accumulator contains

Choose an answer

30% NaCI solution as electrolyte

30% HCI solution as electrolyte

30% H₂SO₄solution as electrolyte

30% NaOH solution as electrolyte

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

A white precipitate ofsilver chlorideimmediately formed on additionof :

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Silver nitrate solution to sodium chloride solution.

Silver chloride solution to sodium nitrate solution.

Silver nitrate solution to potassium chloride solution

Silver nitrate solution to hydrogen chloride solution.

Neutron was discovered by:

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Chadwick.

Bohr.

Rutherford.

Plank.

Picric acid is

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2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

Which one of the following is an ideal solution that obeys Rault's law

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Ethanol + water

Benzene + toluene

HCI + water

Acetone + chloroform

Alkenes combine readily with electrophillic reagents such as halogens giving

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Haloalkanes

Gem-dihalides

Vicinal dihalides

Vinyl halides

The oxidation state of Fe in [Fe(CN)₆]^3-is

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+2

+3

+4

-3

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Which of the following is not isoelectronic?

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Na⁺

Mg²⁺

O^2-

Cl^-

Each of the following compounds is effective as a refrigerant. The release of which one of these causes the greatest depletion of the ozone layer

Choose an answer

CCl₂F₂

CH₃OCH₃

CH₃CHF₂

CH₃CH₂CH₃

The order of reactivity of an alkyl halide (R-X) for a particular alkyl group is

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Iodide > bromide > chloride

Chloride > bromide > iodide

Bromide > chloride > iodide

Bromide > iodide > chloride

Mass spectrometer measures the

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Exact mass of an element

Average mass of an element

The number of elements present in a molecule

m/e value of a positive ion

Which of the following reacts with chloroform and base to form phenyl isocynaide?

Choose an answer

Nitrobenzene

Phenol

Chlorobenzene

Aniline

The apex angle of the folded filter paper is slightly greater is termed as:

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60 degree

30 degree

45 degree

90 degree

The specific conductance of 0.1 M NaCl solution is 1.06 x 10^-2ohm^-1mol^-1. Its molar conductance in ohm^-1cm²mol^-1is

Choose an answer

1.06 x 10²

1.06 x 10³

1.06 x 10⁴

53

For a given process, the heat changes at constant pressure (q_p) and at constant volume (q_v) are related to each other as

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q_p= q_v

q_p< q_v

q_p= qv/2

A molecule in which sp²hybrid orbitals are used by the central atom in forming covalent bonds in

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He₂

SO₂

PCl₅

N₂

Rate of flow can be expressed in

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litre/sec

litre-sec

sec/litre

sec/litre-m

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

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maximum

zero

half of the maximum value

one third of the maximum value

Compton was awarded Nobel prize in physics in

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1921

1923

1925

1927

When a large number of atoms are brought close to one another to form a solid, each energy level of an isolated atom splits into sub-levels, called

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energy bands

energy shells

states

all of them

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

Choose an answer

25

225

625

1250

The system international (SI) is built from _______ kind of unites

Choose an answer

Two

Three

Four

Five

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

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1/2

More than 1/2

Less than 1/2

Between 1 and 2

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

Conventionally, all the distance p, q, f are measured from _____ of the lens:

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Focus

Optical center

Edges

None of these

For Protium, the mass defect is:

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Infinite

Zero

Very large

A few grams

None of these

We can express the work in term of

Choose an answer

directly measurable variables

indirectly measurable variables

either of them

both of them

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

Relativistic mechanics is a branch of physics, which deal with the bodies moving with velocities:

Choose an answer

More then c

Approaching c

Equal to c

Much less than x

The change of magnetic flux through a circuit will produce

Choose an answer

Magnetic Field

Electric Field

emf

a.c

The property of fluids due to which they resist their own flow is called:

Choose an answer

Drag force

Surface tension

Viscosity

None of these

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinte work

The branch of physics which deals with the structure and properties of solids is called:

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Plasma physics

Solid state physics

Any of above

Astrophysics

In the study of thermodynamics, which gas is considered as the working substance

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real gas

ideal gas

any gas may be ideal or real

none of them

The vector in space has:

Choose an answer

One component

Two components

Three components

None of these

If the velocity time graph is a straight line parallel to the time-axis, then it means:

Choose an answer

The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of these

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

Choose an answer

5 rad/sec²

-10 rav/sec²

-10 rad/sec²

-5 rav/sec²

The S.I unit of frequency is

Choose an answer

Vibrations s^-2

Ms^-1

Hertz

s^-1

An inertial frame of reference is that frame of reference in which

Choose an answer

a = 0

a > 0

a < 0

all of them

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid

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speed

height

none of them

both of them

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

Choose an answer

2100 m/s²

1400 m/s²

700 m/s²

400 m/s²

The size of the domain is such that they can contain

Choose an answer

10²to 10⁴atoms

10⁴ to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

X-ray are also known as

Choose an answer

Roentgen rays

Maxwell rays

Plank range

Einstein rays

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Choose an answer

Ideal gas

Inert gas

Real gas

None of these

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

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45°

60°

50°

40°

When quarter of a cycle is completed, the phase of vibration is:

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90°

180°

45°

360°

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

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First

Second

Third

None of these

When two waves with same frequency and constant phase difference phase difference interfere

Choose an answer

There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution changes with time

The energy is redistributed and the distribution remains constant with time

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Choose an answer

Q/4πr²

2Q/4πr²

Q.d

Zero

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Choose an answer

1916

1919

1921

1923

In magnet-coil experiment, emf can be produced by

Choose an answer

Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

Choose an answer

Power

Work

Pressure

None of these

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Choose an answer

F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

The Boltzman constant has the value

Choose an answer

1.38 x 10^-23JK^-1

1.28 x 10^-23JK^-1

1.38 x 10^-26JK^-1

1.28 x 10^-26JK^-1

If speed of electron is 5 x 10⁵m/s. How long does it take one electron to transverse 1 m?

Choose an answer

1 x 10⁶

2 x 10⁶

2 x 10⁵

1 x 10⁵

In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called

Choose an answer

Quadratic equation

Equation of discontinuity

Equation of continuity

None of the above

dimensions are the same for:

Choose an answer

Work and energy

Force and weight

None of these

Both a and b

The magnitude of chemical Effects depends upon:

Choose an answer

Nature of liquid

Quantity of Electricity passed through the liquid

Color of the liquid

Both (A) and (C)

Both (A) and (B)

Polymers are the chemical combination of carbon with:

Choose an answer

Nitrogen

Oxygen

Hydrogen

All of these

None of these

Which of the following diode is used for the detection of light

Choose an answer

photo diode

light emitting diode

photo voltaic cell

all of them

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

At high altitude the blood oozes out of the nose and ear because

Choose an answer

The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decrease there

The density of blood decrease at high altitudes

The valence band of an atom in a solid

Choose an answer

is always empty

may or may not be empty

can never be empty

none of them

An eV is unit of:

Choose an answer

Potential

Energy

Work

Power

Both (B) and(C)

The charge per unit time through any cross-section of a conductor is called

Choose an answer

capacitance

electric power

current

potential difference

The induced current in the loop can be Increased by

Choose an answer

Using a stronger magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All above

Both A and B

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Choose an answer

Refraction

Reflection

Diffraction

Formation of spectrum

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

Choose an answer

600°C

7600°C

800°C

900°C

A non-inertial frame of reference is one, in which

Choose an answer

law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

Unit vector is used to specify:

Choose an answer

Magnitude of a vector

Dimensions of a vector

Direction of a vector

Position of a vector

An vector of 10 N makes an angle of 45° with x-axis. Angle between its rectangular components with be:

Choose an answer

45°

90°

135°

Zero

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

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ammeter

voltmeter

galvanometer

avo-meter

Centripetal force for electron is given by

Choose an answer

mv²/ r

mv / r²

mv²/ r

mr²/ v

If the distance between two charges is doubled, the force between them will become

Choose an answer

Double

Half

Three times

One fourth

One third

If the length of second pendulum becomes four times then its time period will become

Choose an answer

Four time

Two times

Six times

Eight times

The current produced by moving a loop of wire across a magnetic field is called

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

The pointer of a magnetic compass:

Choose an answer

Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Choose an answer

+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

Choose an answer

1900

1906

1912

1918

The input resistance of the OP-AMP is the resistance between the

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(-) input and output

(+) input and output

(-) and (+) inputs

between any inputs

The dimension of linear inertia is:

Choose an answer

MLT²

ML°T^-2

ML°T°

MLT^-1

A process in which no heat enters or leaves the system is called

Choose an answer

isochoric process

isothermal process

adiabatic process

none of them

The effect of applying a force on a moving body is to change

Choose an answer

its direction of motion only

its speed of motion only

both the direction and speed of motion

its inertia only

A the top of the trajectory of a projectile, the directions of its velocity and acceleration are

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Perpendicular to each other

Parallel to each other

Inclined to each other at an angle of 45°

Anitparallel to each other

When a shall explodes a mid-air, the total momentum of its fragments is

Choose an answer

less than the momentum of shell

equal to the momentum of shell

greater than the momentum of shell

none of them

1 amu is equal to.

Choose an answer

1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

One coulomb of charge is created by

Choose an answer

10 electrons

1.6 x 10^-19electrons

6.25 x 10¹⁸electrons

6.25 x 10²¹electrons

Magnetic effect of current is used:

Choose an answer

In electric motor

To detect current

To measure current

All of these

None of these

The pressure will be low where the speed of the fluid is

Choose an answer

Zero

High

Low

Constant

Choose the set of physical quantities, which have both numerical and directional properties:

Choose an answer

Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

The useful unit of angular replacement in SI unit is:

Choose an answer

Degree

Revolution

Radian

Metre

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Choose an answer

very small energy

very large energy

frictional forces

acceleration due to gravity

For a n-p-n transistor, the conventional current equation can be written as

Choose an answer

I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

Physics is one of the branches of:

Choose an answer

Social sciences

Physical sciences

Biological sciences

Abstract art

Significant figures in 0.0010 are:

Choose an answer

Four

Three

Two

One

In bringing an electron towards another electron, electrostatic potential energy of system

Choose an answer

Decreases

Increases

Remains uncharged

Becomes zero

When a shell explodes in mid-air, its fragments fly off in

Choose an answer

only one direction

in two direction

different directions

a particular direction

The body oscillates due to _____ accelerates and overshoots the rest position due to______,:

Choose an answer

Applied force, inertial

Restoring force, friction

Frictional force, inertial

Restoring force, inertial

Nucleus of a hydrogen atom may contain:

Choose an answer

One neutron only

Two protons and one neutron

Two protons and two neutrons

Aany of above

One proton only

Charge on neutron is

Choose an answer

1.6 x 10^-19C

zero

-1.6 x 10^-19C

1.2 x 10^-19C

In LCR circuit which one of the following statement is correct?

Choose an answer

L and R oppose each other

R value increase with frequency

The inductive reactance increases with frequency

The capacitive reactance increases with frequency

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Choose an answer

N = nN_Am = MN_A

n = N N_A, M = mN_A

M = N_A/N , N_A= m/n

N = nN_A, M = mN_A

when the deformation produced in the material become permanent, this type of behaviour is called

Choose an answer

proportionality

elasticity

plasticity

none of them

Huygen's theory cannot explain

Choose an answer

Diffraction

Interference

Polarization

Photoelectric effect

Tesla is the unit of

Choose an answer

Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

To observe interference of light, the condition, which must be met with is that the sources must be:

Choose an answer

Monochromatic

Phase coherent

Both of above

None of above

The dimensions of work

Choose an answer

[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

When the charged particle is projected at right angles to the field, then experienced by it will be:

Choose an answer

Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

transverse wave motion is possible in:

Choose an answer

Air

A mixture of NH₃and O₂

Strings

All of these

Swimming becomes possible because of______law of motion:

Choose an answer

First

Second

Third

None of these

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

Choose an answer

0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

Choose an answer

Force

Density

Work done

Pressure

Work done is maximum when angle between force and displacement is:

Choose an answer

0°

90°

180°

None of these

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Choose an answer

64 W

80 W

100 W

125 W

In a straight current carrying conductor, the direction of magnetic field can be found by

Choose an answer

right hand rule

left hand rule

head to tall rule

none of these